Replacement valve seat of a flush valve



FIG. 1 is a perspective view of a replacement valve seat of the flush valve in accordance with the design;

FIG. 2 is a top view of the replacement valve seat of the flush valve of FIG. 1;

FIG. 3 is a bottom view of the replacement valve seat of the flush valve of FIG. 1;

FIG. 4 is a side view of the replacement valve seat of the flush valve of FIG. 1;

FIG. 5 is a left side view of the replacement valve seat of the flush valve of FIG. 2; and,

FIG. 6 is a right side view of the replacement valve seat of the flush valve of FIG. 2. 

I claim the ornamental design of a replacement valve seat of a flush valve, as shown and described. 